Transmitter, encoding system and method employing use of a bit need determiner for subband coding a digital signal

摘要

Transmitter, encoding system and method for subband coding a digital signal. The encoding system includes a splitter for dividing the digital signal into subband signals SB1, . . . , SBM; a quantizer unit for quantizing time-equivalent q sample signal blocks of the subband signals; a bit need determiner and a bit allocator. The bit need determiner determines a bit need bm which corresponds to the number of bits by which the q samples in a time-equivalent signal block in a subband signal SBm should be represented, where 1